Emperor towers or Kaiser towers (German: Kaisertürme or Kaiserwarten) are monuments that were built up to 1918 in honour of the German emperors William I, Frederick III and Wilhelm II in the German Empire or for Emperor Franz Josef in Austria-Hungary.
The construction of these towers was also intended to counter the so-called Bismarck cult which had resulted, for example, in the erection of hundreds of Bismarck towers and columns.